Frederick sulter



FREDERICK SUL'lEll., 04F-ST. PAUL, MINNESOTA.

Lata-s Patent No. 79,514, amdJm 13o, 1868.

IMPROVEMENT IN STEAM-BOILER FURNACES.

@in thttule referat til-in these tttters @that `mit making had nf thetime.

TO' ALL WHOM IT CONCERN: Be it known that I, FREDERICK SULTER, of St.Paul, Ramsey county,.Sta te of Minnesota, have invented-an ImprovedSmoke-Consuming and Fuel-Saving Heater3`. and I do hereby declare thefollowingtobe an exact' description `thereof, reference being hadto theaccompanying drawings, undvto the letters of reference marked thereon,-making a part of this specification, in Whichf Figure 1 represents aside elevation of the heater or furnace with a boiler at top. Figure 2,a front view of thereplaceand Hue. v Y ,Figure 3 shows'the mouth of thefire-hearth and boiler above.

Y Figure 4l shows the diminished sizeof the fire-hearth at the-.pointeight inches below the boiler, andincl'ining upwards.

Figure represents the rear level of the hearth, tive inches .between thehearth and boiler above, and the rear of the furnace. v l Figure shows.how th'efurnace may be built with one, t\i'o,or three boilers,yso ns tobe used as a stationary engine, a locomotive, or on steaznships.4 I iThe nature of my invention consistsinl the construction of the furnaceor heater forboilers', to be-built of brick or made of iron plates,- sothat the 'hearth shall incline from the fireplace in a proper graduatedinclination, with the greater inclination infront; from thence, ataregular incline, to a. levelnear the rear, where all the smoke, sparks,and cinders are forced, retained, and consumed in a close chamber,`having an air-passage at each side to receive atmospheric air thatrushes into the spacebetwcen the hearth ,andboilen to increase .the heatand assist in consuming the smoke and cinders as they pass through thechamber .in the rear from theibottom of the hearth tot the narrow andupper sides'of the hearth, and against the lower .sidesof the boiler,the sparks ,and cinders falling fdown on the Hoor ofthe rear chamber. Ii

` A represents the fireplace, and B`the nsh-boxl, that are four feetfive inches wide; thereplace being eighteen inches high, and the ash-boxthrty'inches depth, with ordinary close doors in front. i I

' `v C C are the vround air-passages,llocaterl, one on each side ofthefurnacqthree inches in diameter, and one infront of the'other, onebeingr at the distance of six feet from ,tliefront of thefurnace, andtheother eight feet from the front of the furnace, viz, two feetahead oftheother, "These airpassages C C extend -obliquely through the walls of thefurnace, thelength of the passages, according-,to the thickness `of theivalls. A n D is tbehearth, that is seventeen Afeet in length, from thefireplace A to the rear s'parli-chan1ber E. The front end is at an`incline from the fireplace of one and a half 4floot,toward the rear, atsix'inches of a rise, heingeighteen inches vin front and twelve inchesat the top of ineiinlationormouth of thefurnace; from thence, where thespace between the boiler and hearth is twelve'inches,the'heartliinclines back on a straight line for u distance ofnine feet,to a pointat eight inches between the boiler and hearth, the inclination beingfour inches, and' from this eight-inch point, for a distanceof three anda. half feet, ,the hearth extends at another inclination, of threeinches rse,-to the point marked five inches, as the height of the boilerabove the hearth. From this point the hearth is perfectlylevel for 4thedistanceof three feet, tothe end ofthe hearth, where it enters the rear.spark-chamber, E; the hearthwith its arch dhove,'being oval in form,but perfectly circular below and above, on the inside; the arch coveringthe top of the boiler, to retain heat in theboiler, sotltat' when thefire of the furnaeeis put cnt in the eveningthc water of the boiler iskept warinuntil the. morn l ing, thus saving fuel; the top of the boilerhaving been protected fromV the cold air.

:E is the chamber-at the rear` of the furnace. That is seven feet inheightfrom its floor to the top of the arch, on Ithe yins'idel Itisthricel and n. half feet long, and 'tive feet lin width.. The top ofthis chamber is 4.curved or half'hrched-,rfromopposite the' end ofthehearth D to the top of theinside tlues'of-theboiler, andthe rear endof'the boiler citends beyond the end of hearth twain-ches, so to forcethe current or course-of the ame, smoke, and cind'ers downwards,thecinders,sparks, &c.,vfalling tb the iloor of the chamber E. l

l A door, F, is intended'tobe placed vin the'rear, so that the chamber Ecan be cleaned at anytimerequired.

' G represents one or more ordinaryues in a. boiler.

H; the ordinary wind-pipe to clean the boiler. l J, a damper on theupright flue K, that is closed at night, so that the heat cany beretained in the boiler. The flue K is merely for the purpose of carryingo th 'smoke-when the fire is made, and L is the ordinary valve on aboiler.

What I claim as my invention,v and desire to secure by Letters Patent,is-

The construction of the inclined and horizontal surfaces of thesemicircular hearth D, with its side airpassages C C, and sparkanddraught-chamber E, when arranged and combined as herein described andfor the purposes set forth.

FREDERICK SULTER.

Witnesses:

J. FRANKLIN REIGART, f EDM. F. BROWN.

